John m



UNITED STATES PATENT OFFICE.

JOHN M. WALLACE, OF LEADVILLE, COLORADO.

TOLLER FOR GRAIN OR ORES.

SPECIFIGATION forming partof Letters Patent No. 240,344, dated April 19, 1881.

Application filed November 19, 1880. (Model) To all whom it may concern:

Be it known that I, JOHN M. WALLACE, of the city of Leadville, in the State of Colorado, have invented a certain new and useful Sampling-Machine for Taking Samples from the Bulk of Ores, Cereals, &c., which invention is fully set forth and described in the following specification and the accompanying drawings, referred to by letter and figure.

The purpose of my invention is to provide a mechanical means for taking samples at definite intervals from the bulk of pulverized ores, grains, and other like substances to be tested as they are run out from the grinding-mills, elevators, or other points of discharge; audit consists in a novel means of directing or leading from the stream of ore or other substance being discharged a small quantity at certain regular intervals, more or less frequent, and conducting the same into a separate trough, bin, or receiver, whereby the quality and value of the bulk can be readily determined from testing or inspecting the collected samples.

Referring to the drawings, Figure 1 is a vertical section through the center of my machine and its supporting-frame. Fig. 2 is a top view of the rotating hopper, and Fig. 3 is a side elevation of Fig. 2.

My invention as herein shown consists of a conical hopper, circular in cross-section, which is supported and rotated on a vertical axis. An annular trough is formed around the upper rim of the cone, within which are arranged a series of perpendicular spouts, and the lower ends of these spouts project through the inclined sides of the cone around the circumference. The mouth of the discharge spout or conductor, which is supported over the cone, dips into and runs in the annular trough, so that when the bulk of the substance to be sampled is run through this conductor it is directed into the annular trough,and through it into the cone below. As the cone is rotated the small perpendicular spouts are brought in succession below and in line with the principal spout or conductor, and a small quantity of the substance is directed into the receptacle placed beneath the lower end of the small spouts.

A A is the supporting-frame.

B is the conical hopper; 0, its vertical axis,

on which it is rotated by a pulley, D 5 and E is the annular trough around the rim.

F F are the series of perpendicular spouts arranged around the trough at regular distances apart, and G is the receptacle to catch and collect the samples.

His the principal spout or conductor through which the bulk is run. One of such conductors is represented, but others may be added where the capacity of the machine will admit, and two or more streams can be directed into the annular trough but in such case an additional receiver must be provided for each conductor and placed beneath and in line with it to collect the samples as they are directed from the main stream by the rotation of the conical hopper and the action of the small spouts.

By reference to these parts it will be seen that the discharging spout or conductor for the bulk and the receptacle for the samples are situated directly in line with each other, and between them the series of small perpendicular spouts are caused to pass by the rotation of the hopper, so that as often as the small spouts and the principal spout are brought in line one after the other a channel or passage communicating with the sample-receptacle is formed, and during the time that the small spout is moving beneath and past the mouth of the discharging-spout a portion of the stream of ore or other substance will fall into the small spout and pass through it into the receptacle below. The quantity thus caught by the horizontally-moving spouts is regulated by the rate of speed at which the hopper is rotated. The slower the spouts move beneath the stationary conductor the larger will be the quantity that will be caught by each one; but the more rapidly the hopper is rotated the more frequently will the samples be taken. The rotation of the hopper should be uniform, however, that the samples may be taken from the stream at regular intervals. The bulk of the substance discharged is directed into the conical part of the hopper, and runs thence to the outlet at the end, where it is caught by spouts or conductors and led to any desired point.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In an ore-sampler, the combination of the conical rotating hopper, with the samplingspouts arranged at intervals around its periphery, their upper ends within and their lower ends outside the hopper,- for the purpose of separating the samples from the main body of ore, as set forth.

2. In an ore-sampler, the conical rotating hopper provided with an internal ring which forms an annulus open at the bottom within the hopper, said ring: being connected to the hopper by spouts, the upper ends of which open within the annulus and their lower ends without the hopper, substantially as and for the purpose set forth.

3. In an ore-sampler having a rotating hopper provided with the annular opening within the hopper and the spouts opening outside the hopper, the combination of said hopper with the inlet-spout and the stationary receptacle for the samples, substantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 24th day of February, 187 9.

JOHN M. WALLACE. [1. s.]

Witnesses:

O. W. M. SMITH, EDWARD E. OsBoRN. 

